The late William F. Buckley, in Nearer My God: An Autobiography of Faith:

Is it perfect faith that conjures up the miracle? Why is it that no miracles have been recorded at the splendid shrine of the most wondrous of all relics, the Shroud of Turin, but a good many are said to have come to pass at the shrine of the girl-saint Bernadette Soubirous? Are miracles, like beauty, in the eye of the beholder? I do not doubt that Jesus worked his miracles; yet how long the results thereof endured, and whether what the witnesses beheld was physically ‘real,’ we have no means of knowing. Oh for a revelation!